Slewing bearing and engineering machine

Abstract

The utility model relates to engineering machinery technical field, concretely discloses a slewing support bearing and engineering machinery, and slewing support bearing includes inner ring, outer ring and rolling body, and inner ring is located in the outer ring, and rolling body is located between the outer ring and inner ring, and inner ring is connected in the outer ring through rolling body, and the outer peripheral wall of inner ring is equipped with first sealing element between the inner peripheral wall of outer ring, and first sealing element is used for plugging the first gap between the outer peripheral wall of inner ring and inner peripheral wall, and the upper end of inner ring is provided with extension support plate, and the outer side edge of extension support plate extends to the top of outer ring, and the second sealing element is equipped between the lower end surface of extension support plate and the upper end surface of outer ring, and the second sealing element is used for plugging the second gap between the lower end surface of extension support plate and the upper end surface of outer ring, and engineering machinery includes above-mentioned slewing support bearing. The slewing support bearing effectively ensures the reliability and effectiveness between the sealing of inner ring and outer ring.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, and in particular to a slewing bearing support and engineering machinery. Background Technology

[0002] Slewing bearings are essential and critical components in construction machinery such as excavators. A structural reference is provided for one type of slewing bearing in the existing technology. Figure 1 As shown, it includes an inner ring 2', an outer ring 1', and a rolling element 3' disposed between the inner ring 2' and the outer ring 1', and the rotational connection between the inner ring 2' and the outer ring 1' is realized through the rolling element 3'.

[0003] Specifically, to prevent leakage of lubricating oil inside the slewing bearing, a seal 4' is generally provided between the inner ring 2' and the outer ring 1'. In existing structures, the seal 4' is located between the outer peripheral wall of the inner ring 2' and the inner peripheral wall of the outer ring 1', used to seal the gap between the outer peripheral wall of the inner ring 2' and the inner peripheral wall of the outer ring 1'. However, with the above structure, after the slewing bearing is installed on the construction machinery, the weight of the upper structure of the construction machinery will be concentrated on the slewing bearing, which may cause certain deformation and misalignment between the inner ring 2' and the outer ring 1'. This will cause the internal seal 4' to deform and shift, affecting the reliability and effectiveness of the seal. Utility Model Content

[0004] The purpose of this invention is to provide a slewing bearing that effectively ensures the reliability and effectiveness of the seal between the inner and outer rings.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A slewing bearing, comprising:

[0007] Outer ring;

[0008] The inner ring is located within the outer ring;

[0009] A rolling element is located between the outer ring and the inner ring, and the inner ring is rotatably connected to the outer ring through the rolling element;

[0010] A first sealing element is provided between the outer peripheral wall of the inner ring and the inner peripheral wall of the outer ring. The first sealing element is used to seal the first gap between the outer peripheral wall of the inner ring and the inner peripheral wall of the outer ring.

[0011] An extension support plate is provided at the upper end of the inner ring, and the outer edge of the extension support plate extends to the top of the outer ring. A second sealing member is provided between the lower end face of the extension support plate and the upper end face of the outer ring. The second sealing member is used to seal the second gap between the lower end face of the extension support plate and the upper end face of the outer ring.

[0012] Preferably, the upper end face of the inner ring is provided with an insertion groove that extends to the outer peripheral wall of the inner ring, and the bottom of the insertion groove is provided with a first receiving groove that extends to the outer peripheral wall of the inner ring. The extension support plate protrudes to one side of the inner ring and is provided with an insertion head. The insertion head is inserted into the insertion groove, and the first sealing member is provided in the first receiving groove.

[0013] Preferably, the lower end face of the insertion head extends above the first receiving groove and presses against the first seal.

[0014] Preferably, the extension support plate is integrally formed with the insertion head.

[0015] Preferably, the first seal is a Gladley ring.

[0016] Preferably, at least one of the lower end face of the extension support plate and the upper end face of the outer ring is provided with a second receiving groove, and the second sealing member is disposed in the second receiving groove.

[0017] Preferably, the inner ring includes a plurality of inner ring portions arranged in sequence, and a third sealing element is provided between two adjacent inner ring portions, the third sealing element being used to seal the third gap between two adjacent inner ring portions.

[0018] Preferably, at least one of the two adjacent inner ring portions is provided with a third receiving groove, and the third sealing element is disposed in the third receiving groove.

[0019] Preferably, both the second and third seals are configured as annular sealing rings.

[0020] This utility model also provides an engineering machine, including the above-mentioned slewing support bearing, which effectively ensures sealing and makes the slewing operation of the engineering machine reliable and stable.

[0021] An engineering machine includes the slewing bearing described in any one of the above claims, and further includes a chassis and an upper body, wherein the chassis is fixedly connected to the outer ring, and the upper body is fixedly connected to the inner ring.

[0022] Beneficial effects:

[0023] The slewing bearing provided by this utility model incorporates a first seal and a second seal. The first seal seals the first gap between the outer circumferential wall of the inner ring and the inner circumferential wall of the outer ring. The second seal cooperates with an extension support plate located at the upper end of the inner ring. The second seal is positioned between the lower end face of the extension support plate and the upper end face of the outer ring, sealing the second gap between the lower end face of the extension support plate and the upper end face of the outer ring. The first seal seals the longitudinal gap between the inner and outer rings, while the second seal seals the transverse gap between them, further improving the reliability and effectiveness of the seal. Furthermore, the outer edge of the extension support plate extends above the outer ring. When subjected to loads from above, the extension support plate and the second seal also provide some support to the outer ring, reducing deformation and misalignment between the inner and outer rings of the slewing bearing to a certain extent, ensuring reliable and stable sealing.

[0024] The engineering machinery provided in this embodiment, including the aforementioned slewing support bearing, further improves the reliability and effectiveness of the seal, and ensures reliable and stable slewing operation of the engineering machinery. Attached Figure Description

[0025] Figure 1 This is a partial structural diagram of a slewing bearing provided in the prior art.

[0026] Figure 2 This is a partial structural schematic diagram of the slewing bearing provided by this utility model.

[0027] In the picture:

[0028] 1' Outer ring; 2' Inner ring; 3' Rolling elements; 4' Seals;

[0029] 1. Outer ring; 11. Second receiving groove;

[0030] 2. Inner ring; 201. Inner ring section; 202. Third receiving groove; 21. Extension support plate; 221. Insertion groove; 222. First receiving groove; 23. Insertion head;

[0031] 3. Rolling elements;

[0032] 41. First seal; 42. Second seal; 43. Third seal;

[0033] 51. First gap; 52. Second gap. Detailed Implementation

[0034] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0035] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0038] This embodiment provides a slewing bearing. (Refer to...) Figure 2As shown, the slewing bearing includes an outer ring 1, an inner ring 2, and rolling elements 3. The inner ring 2 is located inside the outer ring 1; the rolling elements 3 are located between the outer ring 1 and the inner ring 2, and the inner ring 2 is rotatably connected to the outer ring 1 via the rolling elements 3; a first seal 41 is provided between the outer peripheral wall of the inner ring 2 and the inner peripheral wall of the outer ring 1, the first seal 41 being used to seal a first gap 51 between the outer peripheral wall of the inner ring 2 and the inner peripheral wall of the outer ring 1; an extension support plate 21 is provided at the upper end of the inner ring 2, the outer edge of the extension support plate 21 extending above the outer ring 1, and a second seal 42 is provided between the lower end face of the extension support plate 21 and the upper end face of the outer ring 1, the second seal 42 being used to seal a second gap 52 between the lower end face of the extension support plate 21 and the upper end face of the outer ring 1.

[0039] In this embodiment, the slewing bearing is equipped with a first seal 41 and a second seal 42. The first seal 41 is used to seal the first gap 51 between the outer peripheral wall of the inner ring 2 and the inner peripheral wall of the outer ring 1. The second seal 42 cooperates with the extension support plate 21 disposed at the upper end of the inner ring 2. The second seal 42 is disposed between the lower end face of the extension support plate 21 and the upper end face of the outer ring 1, and the second seal 42 is used to seal the second gap 52 between the lower end face of the extension support plate 21 and the upper end face of the outer ring 1. The first seal 41 seals the longitudinal gap between the inner ring 2 and the outer ring 1, while the second seal 42 seals the transverse gap between the inner ring 2 and the outer ring 1, further improving the reliability and effectiveness of the seal. In addition, the outer edge of the extension support plate 21 extends to the top of the outer ring 1. When subjected to the load above, the extension support plate 21 and the second seal 42 can also provide some support for the outer ring 1, and to a certain extent reduce the deformation and misalignment between the inner ring 2 and the outer ring 1 of the slewing bearing, ensuring reliable and stable sealing.

[0040] In this embodiment, the upper end face of the inner ring 2 is provided with an insertion groove 221 extending to the outer peripheral wall of the inner ring 2. The bottom of the insertion groove 221 is provided with a first receiving groove 222 extending to the outer peripheral wall of the inner ring 2. An insertion head 23 protrudes from the extension support plate 21 towards the inner ring 2. The insertion head 23 is inserted into the insertion groove 221, and the first sealing member 41 is disposed within the first receiving groove 222. Specifically, the insertion groove 221 and the first receiving groove 222 are arranged in a stepped manner on the inner ring 2. The insertion groove 221 and the insertion head 23 are interference-fitted to ensure reliable fixation. The first receiving groove 222 also provides reliable installation space for the first sealing member 41.

[0041] Furthermore, the lower end face of the insertion head 23 extends above the first receiving groove 222 and abuts against the first seal 41. Specifically, when the insertion head 23 is inserted into the insertion groove 221, the lower end face of the insertion head 23 abuts against the first seal 41. This arrangement allows the insertion head 23 to form a limiting fit with the first seal 41, ensuring that the first seal 41 achieves its sealing function while preventing the first seal 41 from moving up and down along the axial direction of the slewing support bearing, ensuring effective positioning of the first seal 41, and ensuring the reliability and effectiveness of the seal.

[0042] Furthermore, the extension support plate 21 and the insertion head 23 are integrally formed. Specifically, the structure of the extension support plate 21 and the insertion head 23 is relatively simple. Therefore, the integral forming design facilitates production and processing, avoids the process of separate assembly of the extension support plate 21 and the insertion head 23, simplifies the installation steps, and correspondingly reduces the introduction of external connecting parts such as bolts and screws, thus simplifying the structure and reducing costs.

[0043] For example, the first seal 41 is a Glyd ring. Specifically, a Glyd ring is a composite seal composed of a PTFE slip ring and a rubber elastomer. It features bidirectional sealing, a wide operating temperature range, low friction loss, and a long service life.

[0044] In this embodiment, at least one of the lower end face of the extension support plate 21 and the upper end face of the outer ring 1 is provided with a second receiving groove 11, and the second sealing member 42 is disposed in the second receiving groove 11. The provision of the second receiving groove 11 also provides a reliable installation space for the second sealing member 42. Exemplarily, the second receiving groove 11 is opened on the upper end face of the outer ring 1, and the second sealing member 42 is disposed in the second receiving groove 11 and abuts against the lower end face of the extension support plate 21. The lower end face of the extension support plate 21 can form a limiting fit with the second sealing member 42, ensuring that the second sealing member 42 achieves the sealing function, while also preventing the second sealing member 42 from moving up and down along the axial direction of the slewing support bearing, ensuring effective positioning of the second sealing member 42, and ensuring the reliability and effectiveness of the seal.

[0045] In this embodiment, the inner ring 2 includes a plurality of inner ring portions 201 stacked sequentially. A third seal 43 is provided between two adjacent inner ring portions 201. The third seal 43 is used to seal the third gap between two adjacent inner ring portions 201. Specifically, the third seal 43 is provided to reliably seal the third gap between two adjacent inner ring portions 201, preventing oil leakage at the third gap.

[0046] Specifically, at least one of the two adjacent inner ring portions 201 is provided with a third receiving groove 202, and the third seal 43 is disposed within the third receiving groove 202. Specifically, one of the two adjacent inner ring portions 201 is provided with a third receiving groove 202, and the third seal 43 is disposed within the third receiving groove 202 and abuts against the other inner ring 2. The lower end face of the inner ring 2 can form a limiting fit with the third seal 43, ensuring that the third seal 43 achieves its sealing function while preventing the third seal 43 from moving up and down along the axial direction of the slewing bearing, ensuring effective positioning of the third seal 43, and ensuring the reliability and effectiveness of the seal.

[0047] Specifically, the multiple inner ring sections 201 are fixedly connected by bolts or other connecting parts.

[0048] In this embodiment, both the second seal 42 and the third seal 43 are configured as annular sealing rings. Specifically, both the second seal 42 and the third seal 43 have a certain degree of elasticity and can adapt to certain deformations.

[0049] For example, the annular sealing ring is made of rubber. Specifically, rubber has high elastic deformation capacity and can quickly return to its original shape after being compressed, effectively compensating for leakage gaps. Its molecular structure can tightly fit the contact surface, maintaining a stable seal in high-pressure, vacuum, or humid environments to prevent liquid or gas leakage.

[0050] This embodiment also provides a piece of construction machinery. The construction machinery includes the aforementioned slewing bearing, a chassis, and an upper body. The chassis is fixedly connected to the outer ring 1, and the upper body is fixedly connected to the inner ring 2. Applying the aforementioned slewing bearing to the construction machinery achieves all the beneficial effects of the slewing bearing described above, further improving the reliability and effectiveness of the seal, and also reducing the deformation and misalignment between the inner ring 2 and the outer ring 1 of the slewing bearing, ensuring reliable and stable sealing, and enabling the construction machinery to stably perform its slewing function.

[0051] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A slewing bearing, characterized in that, include: Outer ring (1); The inner ring (2) is located inside the outer ring (1); A rolling element (3) is located between the outer ring (1) and the inner ring (2), and the inner ring (2) is rotatably connected to the outer ring (1) through the rolling element (3). A first sealing element (41) is provided between the outer peripheral wall of the inner ring (2) and the inner peripheral wall of the outer ring (1). The first sealing element (41) is used to seal the first gap (51) between the outer peripheral wall of the inner ring (2) and the inner peripheral wall of the outer ring (1). An extension support plate (21) is provided at the upper end of the inner ring (2). The outer edge of the extension support plate (21) extends to the top of the outer ring (1). A second sealing member (42) is provided between the lower end face of the extension support plate (21) and the upper end face of the outer ring (1). The second sealing member (42) is used to seal the second gap (52) between the lower end face of the extension support plate (21) and the upper end face of the outer ring (1).

2. The slewing bearing according to claim 1, characterized in that, The upper end face of the inner ring (2) is provided with an insertion groove (221) that extends to the outer peripheral wall of the inner ring (2). The bottom of the insertion groove (221) is provided with a first receiving groove (222) that extends to the outer peripheral wall of the inner ring (2). The extension support plate (21) protrudes to one side of the inner ring (2) and is provided with an insertion head (23). The insertion head (23) is inserted into the insertion groove (221), and the first sealing member (41) is provided in the first receiving groove (222).

3. The slewing bearing according to claim 2, characterized in that, The lower end face of the insertion head (23) extends above the first receiving groove (222) and presses against the first seal (41).

4. The slewing bearing according to claim 2, characterized in that, The extension support plate (21) and the insertion head (23) are integrally formed.

5. The slewing bearing according to claim 1, characterized in that, The first seal (41) is a Gladwell ring.

6. The slewing bearing according to claim 1, characterized in that, At least one of the lower end face of the extension support plate (21) and the upper end face of the outer ring (1) is provided with a second receiving groove (11), and the second sealing member (42) is provided in the second receiving groove (11).

7. The slewing bearing according to claim 1, characterized in that, The inner ring (2) includes a plurality of inner ring portions (201) stacked sequentially, and a third seal (43) is provided between two adjacent inner ring portions (201), the third seal (43) being used to seal the third gap between two adjacent inner ring portions (201).

8. The slewing bearing according to claim 7, characterized in that, At least one of the two adjacent inner ring portions (201) is provided with a third receiving groove (202), and the third seal (43) is provided in the third receiving groove (202).

9. The slewing bearing according to claim 7, characterized in that, Both the second seal (42) and the third seal (43) are configured as annular sealing rings.

10. An engineering machinery, characterized in that, The slewing bearing includes any one of claims 1-9, and further includes a chassis and an upper body, wherein the chassis is fixedly connected to the outer ring (1), and the upper body is fixedly connected to the inner ring (2).

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